Serbian translation very low

Problem with Serbian language, only title is translated, but weather description none. Also, if you find solution, in languages was option for serbian latin, but it is also disappeared. For example: the croatian language is full translated.

"title":"Петак",
"fcttext":"Cloudy skies this morning will become partly cloudy this afternoon. High 48F. Winds light and variable.",
"fcttext_metric":"Cloudy skies early, followed by partial clearing. High 8C. Winds light and variable.",